Ignition-dynamo.



0,15. MASON. lGNlTlON DYNAMO. APPLICATION HLED JAN-25,1915- Patented July 11, 1916.

2 SHEETS-SHEET I wi/lmeooeo C. T. MASON.

AAAAAAAAA 0N FILED JAN.25. 1915.;

Patented July 11, 1916. 2 SHEETS-SHEET 2.

- UNITED STATES PATENT oEEIoE.

CHARLES THOMAS MASON, OF SUMTER, SOUTH CAROLINA, ASSIGNOR, BY MESNE ASSIGNMENTS, TO SPLITDORF ELECTRICAL COMPANY, OF NEWARK, NEW JERSEY,

A CORPORATION OF NEW JERSEY.

IGNITION-DYNAMIC.

Application filed January 25, 1915.

T 0 all whom it may concern Be. it known that I, CHARLES THOMAS MAsoN, a citizen of the United States, residing at Sumter, in the county of Sumter and State of South Carolina, have invented certain new and useful Improvements in Ignition-Dynamos, of which the following is a specification, reference being had to the accompanying drawing.

.My invention relates to ignition dynamos and has for its object the production of a machine of this class which shall be highly efiicient in operation, proof against short circuits or other derangement, and of simple and reliable construction.

The present invention is in the nature of an improvement over that described and claimed in Patent No. 1,105,361, granted to me July 28, 1914, and my prior applications Serial Nos. 732,681 and 781,414. In my said patent I have shown and claimed a generator having a primary field, a secondary field structure carrying a generating coil. and a rotor associated with the primary field and adapted to shift the flux therefrom alternately through the opposite members of the secondary field and through the generating coil so as to produce reversal of current therein. The generating coil and its supporting structure and pole pieces were adjustable for timing purposes, being rotated about the .axis of the rotor. applications above noted a similar structure is described, with certainadditions and modifications adapting the machine for commercial use. On the outside of one polar extremity of the primary field, and coaxial with the rotor is an'interrupter box capable of being turned with the generating coil, as required for the purpose of timing the spark. The'circuit of the coil is carried to its interrupter through a U-shap'ed connector bar or wire straddling the limb of magnet so as to leavea clearance for travel of the connected parts. I

The foregoing arrangement has given excellent results, but I have found it possible to greatly increase the volume. of the spark delivered as well as to intensify the same and render it somewhat hotter, by expanding the diametral dimension of each rotor to equal practically the extreme width of the Specification of Letters Patent.

In my- Patented July 11, 1916.

Serial No. 4,357.

primary field pole piece with which it is associated. I have also found it desirable to dispense with the exposed U-shaped con- -not only to simplify the construction, but

also to increase the insulati0n to a point where it is practically impossible to break it down, even with the potentials produced in this machine.

The foregoing points constitute the leading features of improvement which will be described and claimed in this application and ancillary features will sufficiently appear from the detailed description hereinafter.

My invention is illustrated in the accompanying drawings in which Figure 1 is a side view of the machine with parts broken away andin section to show the interior arrangement. Fig. 2 is an end view of the same. Fig. 3 is an opposite end view or elevation. Fig. 4 is a perspective view of the base casting removed. Fig. 5 is a diagraphic view showing the relation of the rotor members to the field magnets. ,Fig. 6 is a sectional view showing a detail of the rotor shaft end thrust bearings.

Referring to the drawings and especially to Figs. 1 and 2, M designates the magnetic field structure usually composed of a pair of U-shaped permanent magnets, as indicated in dotted lines in Fig. 2. These are inclosed within end cover plates C, C", a curved top plate C, and side plates C which are formed up with concavities to permit lateral adjustmentof the generating coil G, as the latter is swung from side to side for timing purposes. As this adjustment has been described in my prior Patent No. 1,105,361 hereinbefore referred to, I need only say here that this feature of the operation is the same in the present case. The rotor in this machine consisting of two permanently polarized rotary members, substantially the same as those in the patentreferred to, is housed within the magnetic field in a structure R, and the diametral dimensions of the two rotor membersare such pneaof the poles of the permanent field mag- *net; in its rotation describes a circle extendmga n y acro s th fec. ;c-..t11,e-.,-.

magnet poleor poles. This is'indi'cated by the dottedcircle in Fig. 2,and; will beclearly understood after reading the patent. It is diagraphically indicated in thesmall diagram Fig. 5, onej'-'-rotbr --el em'ent. being indicated at 'r' and the'coil at and the magnets at M, the rotary path of the element '1' bflni indicated as in Fig. 2' by adotted cirthat the end plate C-is really apart of the casting C and upon its outer face car- .yir es'jaflange 0 within which the breaker box B is seated, being retained in place b'y'means of the springb carried on the post 12'.

The numeral 1 denotes a flexible wire or 1 cable connected to the primary terminal 2 of the generating coil G.- This conductorv passes through an insulatingtuhe 3, inserted the surface 14 of the framefi the machine through openings in the lower" part of the base casting G the, rotor casing and the breaker box, and withinthe latterthe other end of theconductor or cable is secured to one terminal of the circuit breaker, as indicated at F) in Fig. 3. The other side of the circuit as usual is completed through .the frame of the machine, the actual make and break being produced by the cam acting upon the contacts '6 The breaker box has a laterally projecting arm 1) for partially rotating the boxwithin the flange '0, and by means of the sleeve connection 8 between the box and the rotor casing R, upon which the .-generating coil and its structure are =me-' chanically carried, said structure is moved with the breaker box, [so that both thegencrating poles and the'circuit breaking con tacts are simultaneously.. and,equally adjusted for timing purposes. .Itwill be observed that by the a'rrangement thus described of the conductor 1 and the tube 3, the external projection of the U-shaped connecting bar is avoided, and since the breaker box and rotorare. tamed-together and always through the same angle, the-tube 3,

which is bridge'd'from one to the other and supported thereby at its-ends,;mainta1ns1ts relative position unchanged although it oscillates through the total'angle of timingad justment, with respect to the base plate and the field ma nets. In order to permit this oscillation 'o the tube 3 and the conductor 1, the opening through the base plate or rather through the endplate C, is made in the form of a slot 5 (see Figs. 1 and4), this slot .lying in the arc of a circle concentric with the axis of the rotor ahilbreaker box, and its "ends subtending aniznigle equal to the total motion of the coil without substantial leaka safety spark arrangement.

By reference to Fig. 4, it will be observed comprise an insulating bushing 9 fitted into :tion or the direct connection to the point of discharge or external circuit control. Inasmuch as the coil, however, is adjustable and not fixed, while the terminal I) of whatever nature being external, is preferably fixed, and since the potentials generated in the windingsofthe coil G are veryhigh, I pro vide special means for completing theconage. ,Directly associated with these means is Said means an opening in the side of one of the magnets. Within the bushing is fitted'a metal tube 10 carrying 'asliding brush 11, which bears against and makes sliding contact with the member 12 secured upon the coil and forming the immediate" terminal of its secondary winding. A projecting point 13is formed on the contact 12 at a properdistance from minal proper comprises-.th co'nductor 17 connected in suitabl the tube 10 to the brush. I within the solid insulation l attached by screws or other suitable means to the top' of the end plate C.

The details of design, dimensions, and pecific arrangement of this machine may be varied considerably without departing. from the spirit of the present; invention, which is characterized particularly by the three features hereinbefore recounted, viz, the large diameter rotor, which covers the entire inner surface of themagnet poles, the inclosed and protected connecting link 3, and the high tension terminal and safety gap D, 15, 17, 10, 11, 12, 14. The rotor elements may be made with large hubs,'so that fiux from the entire inner face of each magnet may be carried without loss to the across to the breaker box at-various other points than the one chosen, so ile ig as they are inclosed within the structure and provision is made for the oscillation of the bridging conductor as by the slot 5. The high tension terminal and safety gap may also be varied in details which will readily occur to those skilled in the art.

In Fig. 6 I have shown a detail of some importance and shall claim the same. This consists in the provision of special means to take the end thrust of the rotor shaft, comprising washers of hard fiber or equivalent material, set into the inner faces of the plates 1. I and surrounding the bearings p, p. The washers are indicated at WV, W, and against each of them rests a shoulder formed on the shaft, as well as the outer face of the rotor member. This feature also can be varied somewhat, without departing from the invention, especially in the dimensions and relations of the parts, so long as the principal purpose is served of having the end thrust taken up without the neces- F sity for accurate facing of the metal parts,

which is expensive. 7

In general, I wish it'distinctly understood thatall changes and modifications in the devices hereinbefore described, which do not depart from-the spirit of the invention, are included Within the scope of the appended claims.

Having thus described my invention, what I claim and desire to secure by Letters Patent is:

1. In an ignition dynamo, a magnetic field structure, a rotor, a generating coil structure separate from said rotor, means for shifting flux due to a circuit breaker, and a circuit connection between thecoil and the circuit" breaker inclosed and concealed throughout its entire length.

2. In an ignition dynamo, a magnetic field structure, a rotor, a generating coil separate from the rotor due to a circuit breaker and a conductor extending from a terminal of the coil to a terminal of the circuit breaker, inclosed throughout its entire length, and protected by. a rigid envelop against the movement of adjacent mechanical parts.

In an ignition dynamo, a magnetic field structure, a rotor, a generating coil separate from said rotor due to a c1rcu1t breaker,

a tube extending from the coil structure'into the circuit breaker structure, and a conductor connected at one end to a terminal of the generating coil, passing? through said tube, and connected at the other end to a terminal of the circuit breaker.

4, In an ignition dynamo, a magnetic field structure, a generating coil structure, means for shifting flux due tpthe magnetic field,

soas to generate electromotive forces in the 0 11, a circuit breaker, a mechamcal connection between the circuit breaker and the generating coil structure whereby said parts may be angularly displaced around the axis of the flux shifting means for timing purposes, and a conductor extending from one terminal of the generating coil through inclosed portions of the coil structure and the breaker, and connected to a terminal of the latter, said conductor constituting in part a bridge electrically connecting the coil and the breaker and mechanically movable therewith.

5. In an ignition dynamo the combination of the following instrumentalities: field magnets, a rotor composed of permanently polarized elements connected respectively to the poles of said magnets, a generating coil structure having pole pieces adjacent said rotor, a breaker box containing circuit breaking contacts actuated from the rotor shaft, said box lying on the opposite side'of one of the field magnet poles from the rotor, a mechanical support for the coil structure with a sleeve connectiop to the breaker box for simultaneous and angular adjustment, a base supporting the field magnets and associated parts, and a conductor extending from one terminal of the generating coil to a support on the coil structure contiguous to the base, and thence through openings in the base and breaker box, and connectedto one of .the terminals therein.

6. In anignition dynamo the combinationof the following instrumentalities: fieldv magnets, a rotor composed of permanently polarized elements connected respectively to the poles of said magnets, a generating coil structure having pole pieces adjacent said rotor, a breaker box containing circuit breaking contacts actuated from the rotor shaft, said box lying on the opposite side of one of the field magnet poles from the rotor, a mechanical supportfor the coil structure with a sleeve connection to the breaker box for simultaneous and angular adjustment, :1

base supporting thev field magnets and associated parts, said base carrying a fiange or end plate constituting a support for one field magnet pole and slotted beneath said pole in an arc concentric with the axis of the rotor and breaker box, anda bridging conductor extending from a trminal of the generating coil to a point contiguous to the base but within the magnet pole, and thence through said slot into the bottomof the breaker box, with its end connected to a terminal therein.

7. In an ignition dynamo the combination of the following instrumentalities: a field magnet structure, a rotor, a eneratin'g coil structure separate from sai rotor, means completelyinclosing said elements, a circuit breaker box located on the outside of the inclosure andcontaining contacts adai ted to e act ated fromlthelrotor shaft, an a con-,-

ductor entirely inclosed throughout its length, connecting a terminal of the generating coil to a terminal in the breaker box.

8. In an ignition dynamo a magnetic field structure, a generating coil structure and a rotor inclosed Within the field structure, a breaker box lying outside of the field structure, and non-rotatable mechanical and electrical connections extending directly between the coil structure and the circuit breaker, said electrical connection extending through the supporting means for the mechanical connection.

9. In an ignition dynamo, a field structure, a generating coil structure, and'a rotor all completely inclosed, a circuit breaker separately inclosed and located on the outside of the first inclosure, a mechanical connection between the coil structure and the breaker for angular adjustment in timing, and a non-rotatable circuit connectionforming a. bridge from a terminal of the generating coil to a terminal of the breaker extending through both inclosures, itself completely inclosed throughout its length.

10. In an ignition dynamo, a field structure, a generating coil structure, and a rotor all completely inclosed, a circuit breaker separately inclosed and located on the outside of the first inclosure, a mechanical connection between the coil structure and the breaker for angular adjustment in timing, and a circuit connectionforming a bridge from a terminal of the generating coilto a terminal of the breaker through both inclosures, itself completely inclosed throughout its length and having play in the opening in the first inclosure, for mechanical movement in the adjustment of its connected parts-e 11. In an ignition dynamo, a field magnet structure, a generatingcoil structure lying within the field magnet, a rotorhaving permanently polarized .elements constituting continuations of the field magnet poles and driven to shift magnetic flux With respect to the coil structure, a circuit breaker mounted outside of one limb of the field magnet, and a high potential insulated terminal permanently mounted on the outside of the other limb, with a connection through said limb to the generating coil on the in side thereof and a safety gap formed by a sparking terminal attached to said connection and spaced a suitable distance from the contiguous portion of the frame ofthe machine.

13. In .an ignition dynamo a field magnet, a generating coil structure and a rotor, said coil and rotor lying inside the field magnet, a high potential insulated terminal secured to the outside of the magnet with an insulated brush extending through the magnet and a cooperating sliding terminal carried on the coil and connected to its-windings, together with means for Il'lOViIl said coil and its structure with respect to tie rotor, for timing purposes.

14, In an i ltion dynamo having a fixed field, a driving rotor and an adjustable generating coil, the combination of an extended terminal connected to and carried by said coil, a'coiiperating brush terminal fixed to the field'structure, insulation surrounding saidterminal, and an external conductor connected thereto.

15. In an ignition dynamo, a magnetic field structure, a generating coil carrying an extended circuit terminal, a brush making contact with said extended terminal during f movement of the coil, and a cocperating,

terminal located in contiguity to the extended terminal to form a safety spark gap for the coil in all positions.

-- 16. In an ignition d namo, a field magnet and generating coi a terminal for the coil, and an exposed coiiperating terminal rigidly supported in contiguity to said coil terminal to form a safety gap.

. 17. In an ignition dynamo, a field magnet, a generating coil, and a high potential terminal structure for said coil supported on the magnet and comprising an insulated fixed tube or carrier, a spring pressed brush therein, an insulated conductor leading from said tube and brush, and an extended 'terminal on the coil making contact with the brush throughout the entire range of movement of the coil.

18, In an ignition dynamo, a field magnet, a generating coil, and a high potential terminalstructure for said coil supported,

on the magnet and comprising an insulated fixed tube or carrier, a spring pressed brush therein, an insulated conductor leading from said tube and brush, and an extended terminal on the coil making contact with the brush throughout the entire range of movement of the coil and provided with a projection extendingwithin a proper distance of -a portion of the metallic frame of the machine to constitute a safety spark gap in all positions of the coil.

. 19. An ignition dynamo comprising a field magnet structure having opposite poles, a generating coil structure having cooperating poles between and at an angle with the field poles, and a rotor ing permanent polarized elements each con- Gopies of this patent may he obtained for stitutingan-extension of one of the field magnet poles, and each element in its rotation covering a circular area having a diameter equal to the greatest width of its polar face.

20. An ignition dynamo comprising field and coil structures, with a rotor having its axis passing through the field poles and in rotation describing a' figure whose ends extend completely across the inner polar faces respectively.

21. In an ignition dynamo afield structure including a core having-a winding carried thereby, a rotor havin members of permanent .and opposite po arity with a shaft journaled in bearings having a fixed relation to the field structure, and supplemental bearings to take end thrust of the five cents each, by addressing the WashingtonQDfl.

shaft consisting of washers surrounding the shaft beside the main bearings.

22. In an ignition dynamo a field structure including a core having a Winding carried thereby, a rotor having members of permanent and opposite polarity with a shaft journaled in bearings having a fixed relation to the field structure, and supplemental hearings to take end thrust of the shaft consisting of fiber Washers set into the inner faces of the main bearing plates or flanges, the shaft being shouldered at both ends to bear against said Washers.

In testimony whereof I hereunto affix my signature in the presence of two witnesses.

CHARLES THOMAS MASON.

Witnesses:

H. R. VAN DEVENTER, EDNA ESLER.

Uommissioner of Patents, 

